exxos's Atari, Amiga & retro forum

PaulJ wrote: 25 Mar 2020 16:53 @PhilC , if your attempting to use the decode signal off the boards ROM your one pin off. Your two in and it should be three. Why is the wire connected to the eprom socket if your using the eprom on the board?

Thanks Paul, I'll move that and retry it with the rom in the H4 socket.

Its amusing, buy 3m sockets and it dont work :lol:

PhilC wrote: 25 Mar 2020 17:03

PaulJ wrote: 25 Mar 2020 16:53 @PhilC , if your attempting to use the decode signal off the boards ROM your one pin off. Your two in and it should be three. Why is the wire connected to the eprom socket if your using the eprom on the board?

Thanks Paul, I'll move that and retry it with the rom in the H4 socket.

Its amusing, buy 3m sockets and it dont work :lol:

Phil, just put the rom in the IDE board socket?

I did on both boards and it doesnt work for me.

PhilC wrote: 25 Mar 2020 17:27 I did on both boards and it doesnt work for me.

Nothing looks out of place... is your sip in with common pin toward IDE connector?

@PaulJ yes it is.

One thing, can someone confirm if I am right. Ceramic caps with two digits only are in picofarads? The two I have used are 33 and 50.

PhilC wrote: 25 Mar 2020 18:14 @PaulJ yes it is.

One thing, can someone confirm if I am right. Ceramic caps with two digits only are in picofarads? The two I have used are 33 and 50.

@PhilC , Don't know if that's a valid assertion, if you have a newer meeter it usually has a capacitance setting. Hows it going finding the fault?

Isn't it usual that the last digit is the scale factor? i.e. a 0 at the end denotes picofarad, a 1 would be x10, a 2 would be x100 etc.? So the 33 would be 3000 pF and the 50 5 pF.

I think that's just for 3 digit caps and not 2. I did google it and it was a bit inconclusive.

I'll measure them with one of my meters tomorrow and check it out anyway. Will feedback results here.

@PaulJ had no time tonight in the end. Hope to do a bit tomorrow though.

The 2 number caps are normally in pF. The ones I got here are stamped 50 and are 50pf. 3 digit would be 500. 50 + 0 zeroes. Which would make 501 50 + 1 zero which would be 500pf.

exxos wrote: 25 Mar 2020 23:03 The 2 number caps are normally in pF. The ones I got here are stamped 50 and are 50pf. 3 digit would be 500. 50 + 0 zeroes. Which would make 501 50 + 1 zero which would be 500pf.

Thanks, that's what I thought. :dualthumbup: